Method of making a brush



Jan. 12, 1965 o. P. GLAS METHOD OF MAKING A BRUSH Filed Dec. 12. 1961 INVENTOR QflV/IZD P5119: BY C/ {7 ATTORN EY United States. PatentfOfiice 3,165,362 Patented Jan. 12, 1965 3,165,362 METHOD OF MAKING A BRUSH Oswald P. Glas, New York, N.Y., assignor to American Technical Machinery Crp., Mount Vernon, N.Y., a corporation of New York Filed Dec. 12, 1961, Ser. No. 158,70S 1 Claim. (Cl. 300-21) This application relates to a method of making a brush of the type particularly adapted to clean relatively small infant bottles.

An object of this invention is to provide a method for easily manufacturing a brush having two sections, the first or front section being formed of a cluster or tuft of bristles being bunched together at the center region and spread at the sides in a plane forming a fan shaped pattern and the second section being positioned to the rear of the first section and formed of a standard radial array of bristles.

A further object of this invention is to provide a method for manufacturing a brush of a construction described above in which conventional brush forming equipment may be utilized to form the standard radial array section.

Other objects and various further features of novelty and invention will be pointed out or will occur to those skilled in the art from a reading of the following specification in conjunction with the accompanying drawings. In said drawings, which show, for illustrative purposes only, a preferred form of the invention:

FIG. 1 is a perspective view of the brush which is to be made according to my invention.

FIG. 2 is an exploded perspective view illustrating the first step in forming the front section of the brush.

FIG. 3 illustrates the next step in forming the brush in which the bristles are applied to the ferrule.

FIG. 4 is a cross-sectional view along 4--4 of FIG. 1.

FIG. 5 is a front-sectional view along 5-5 of FIG. 4.

A conventional brush which is made by my novel method has a front section formed of a cluster of bristles closely spaced together and projecting generally parallel to the axis or long dimension of the brush. Some bristles are arranged in a pattern emanating from the center of this cluster and project at an angle to the brush axis in a radial fan shaped pattern; the brush further has a second section spaced just behind the front section in which the bristles are arranged conventionally, that is, the bristles project at radially spaced intervals in a direction perpendicular to the axis of the brush.

In the conventional method for making this brush, a length of wire is provided which is bent in the form of an elongated U having its sides spaced very close together the sides of the U constituting first and second wire sections. If desired, two wires may be used and for purposes of this description, the sides of the U may be considered as two separate Wires. The bristles are applied between the wire sections in a generally transverse direction and at uniformly spaced locations. For a description of a specific brush twisting machine, reference is made to US. Patent No. 2,742,327 issued April 17, 1956.

After the bristles have been placed between the wire sections over the part of the length which is to hold the bristles of the brush, a rotatable gripping member such as a chuck, grips the outer front or unconnected ends of the wire sections while the other ends of the wire sections remain fixed. The chuck rotates the front ends of the wire sections relative to the rear sections, twisting the wires, one over the other into a helical formation, and as a result of which, the bristles are secured between twists. The bristles thereby extend radially in a generally transverse direction.

Conventional machinery and methods exist for producing brushes having twisted wires with transversely extending bristles, but neither these methods nor machines have been heretofore utilized in the manufacture of the subject brush. This is because the subject brush comprises the above described front section which cannot be gripped in accordance with conventional methods.

In FXG. 1, there is shown a brush made in accordance with my method. I first form the conventional part of the brush 13 at the front part of the twisted wires 1; however, between the front end of the twisted wires 1 and the conventional part 13, a bare stem 12 having bare ends 14' and 15' is provided. The bristles are fastened or held in place between the twisted wires 14 and 15 in the manner heretofore described.

As shown in FIG. 2, a ferrule 16 shaped as a small cap having a thickened base 17 and circular upstanding side walls with side slots 18 therein is utilized. The side slots extend through the side walls and are generally parallel to the axis of the ferrule. A tuft of bristles 19 (the bristles being generally parallel to each other), is positioned transversely to the axis of said ferrule. A U-shaped staple 2i is placed around the tuft of bristles 19 and an external force is applied to push the staple into the hollow portion of ferrule 16 and into the base section 17. Since the bristles are between the legs of the U-shaped staple 2d, the force pushes the center portion of the bristles into the ferrule and the staple 2t) locks the bristles in position.

As shown in FIG. 3 some of the bristles 21 fill the slots 18 and form a generally radial pattern resembling a spread fan. The remaining bristles 22 are closely spaced together as a cluster and are pushed deeply into the ferrule 16 and project away from the brush along the axial direction thereof. As shown in FIG. 4 the bristles 22 are bent around the base of staple 20 to assume also an elongated U-shape.

Although a staple 20 has been shown, other means for pushing the bristles into the ferrule and securing them in place may be utilized such as cement, clamps or simply al tight fit. Further, the ferrule may contain two or more s ots.

Thus far the front section 10 has been formed having a fan pattern 21 and cluster 22; the rear section of the brush 23 has been formed by conventional machinery leaving the front ends of the wire 14' and 15' bare. The bottomor outer part of the base of ferrule 16 has a small internal bore 25 to receive the outer part of stem 12 and twisted ends 14 and 15'. Other adhesion means will occur to those skilled in the art to fix twisted wires 14' and 15' in position in rigid engagement with base 17.

The wires 14 and 15 may then be pushed into bore 25 and embedded therein by a suitable cement or plastic. The ends of 14' and 15 are shown in FIG. 4 as being flush against the base of bore 25.

I claim:

A method of making a brush comprising the steps of:

providing a penetratable ferrule having a pair of basespaced coaxial bores of unequal diameter, the larger 3 of said bores having a pair of diametrically opposed axial slots therein;

positioning a tuft of bristles transversely of said larger bore with a U-shaped staple embracing said tuft adjacent said larger bore;

pushing said staple into said larger bore with sulficient force to implant it in said ferrule base, thereby fanning a plurality of said bristles in said slots with the remaining bristles axially disposed;

forming a second section of said brush by placing a 10 series of bristles between two spaced parallel wires 4 a a while leaving a predetermined relatively small length ofwires .at the front ends devoid of bristles, twisting said wires to lock said bristles in place, and securely mounting said front end in the smaller ferrule bore. 7

Reichert etal Mar. 11, 1913 Weiler Apr. 12, 1960 

